publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2020-12-18 | Lasing in Group-IV materials | Silicon photonics in the near-Infra-Red, up to 1.6 um, is already one of key
technologies in optical data communications, particularly short-range. It is
also being prospected for applications in quantum computing, artificial
intelligence, optical signal processing, where complex photonic integration is
to be combined ... | 2012.10220v1 |
2020-12-18 | Rare-earth-free ferrimagnetic Mn4N sub-20 nm thin films as high-temperature spintronic material | Ferrimagnetic alloy thin films that exhibit perpendicular (out-of-plane)
magnetic anisotropy (PMA) with low saturation magnetization, such as GdCo and
Mn4N, were predicted to be favorable for hosting small Neel skyrmions for room
temperature applications. Due to the exponential decay of interfacial
Dzyaloshinskii-Moriy... | 2012.10493v1 |
2020-12-21 | Nonstationarity Analysis of Materials Microstructures via Fisher Score Vectors | Microstructures are critical to the physical properties of materials.
Stochastic microstructures are commonly observed in many kinds of materials and
traditional descriptor-based image analysis of them can be challenging. In this
paper, we introduce a powerful and versatile score-based framework for
analyzing nonstatio... | 2012.11135v1 |
2020-12-24 | Thermal performance of GaInSb quantum well lasers for silicon photonics applications | A key component for the realization of silicon-photonics are integrated
lasers operating in the important communications band near 1.55 ${\mu}$m. One
approach is through the use of GaSb-based alloys which may be grown directly on
silicon. In this study, silicon-compatible strained
Ga$_{0.8}$In$_{0.2}$Sb/Al$_{0.35}$Ga$_... | 2012.13369v1 |
2020-12-31 | Topological effects of phonons in GaN and AlxGa1-xN: A potential perspective for tuning phonon transport | Tuning thermal transport in semiconductor nanostructures is of great
significance for thermal management in information and power electronics. With
excellent transport properties, such as ballistic transport, immunity to point
defects and disorders, and forbidden backscattering, topological phonon surface
states show r... | 2012.15500v2 |
2021-01-13 | Natural hyperbolicity in the layered hexagonal crystal structure | Discovering the physical requirements for meeting the indefinite permittivity
in natural material as well as proposing a new natural hyperbolic media offer a
possible route to significantly improve our knowledge and ability to confine
and controlling light in optoelectronic devices. We demonstrate the
hyperbolicity in ... | 2101.05262v2 |
2021-01-14 | Materials Fingerprinting Classification | Significant progress in many classes of materials could be made with the
availability of experimentally-derived large datasets composed of atomic
identities and three-dimensional coordinates. Methods for visualizing the local
atomic structure, such as atom probe tomography (APT), which routinely generate
datasets compr... | 2101.05808v1 |
2021-01-15 | Ab initio investigations of point and complex defect structures in B2-FeAl | In this work we have studied the defect structure and corresponding defect
concentration investigations through the theoretical, experimental and
computational works on B2-type Fe-Al alloys. We have used ab initio framework
in order to investigate the defect structure. To have a proper explanation for
high defect conce... | 2101.06050v1 |
2021-01-18 | Systematic electrochemical etching of various metal tips for tunneling spectroscopy and scanning probe microscopy | Hard point-contact spectroscopy and scanning probe microscopy/spectroscopy
are powerful techniques for investigating materials with strong expandability.
To support these studies, tips with various physical and chemical properties
are required. To ensure the reproducibility of experimental results, the
fabrication of t... | 2101.07090v1 |
2021-01-20 | Effect of Oxygen and Aluminium Incorporation on Local Structure of GaN Nanowires: Insight from Extended X-ray Absorption Fine Structure Analysis | A thorough investigation of local structure, influencing macroscopic
properties of the solid is of potential interest. We investigated the local
structure of GaN nanowires (NWs) with different native defect concentration
synthesized by the chemical vapor deposition technique. Extended X-ray
absorption fine structure (E... | 2101.08121v1 |
2021-01-29 | Reservoir Computing with Magnetic Thin Films | Advances in artificial intelligence are driven by technologies inspired by
the brain, but these technologies are orders of magnitude less powerful and
energy efficient than biological systems. Inspired by the nonlinear dynamics of
neural networks, new unconventional computing hardware has emerged with the
potential to ... | 2101.12700v2 |
2021-02-01 | Polycrystal plasticity with grain boundary evolution: A numerically efficient dislocation-based diffuse-interface model | Grain structure plays a key role in the mechanical properties of alloy
materials. Engineering the grain structure requires a comprehensive
understanding of the evolution of grain boundaries (GBs) when a material is
subjected to various manufacturing processes. To this end, we present a
computationally efficient framewo... | 2102.00666v2 |
2021-02-05 | Prediction of crystal structures and motifs in the Fe-Mg-O system at Earth's core pressures | Fe, Mg, and O are among the most abundant elements in terrestrial planets.
While the behavior of the Fe-O, Mg-O, and Fe-Mg binary systems under pressure
have been investigated, there are still very few studies of the Fe-Mg-O ternary
system at relevant Earth's core and super-Earth's mantle pressures. Here, we
use the ad... | 2102.03402v1 |
2021-02-06 | Unlocking the Origin of Compositional Fluctuations in InGaN Light Emitting Diodes | The accurate determination of the compositional fluctuations is pivotal in
understanding their role in the reduction of efficiency in high indium content
$In_{x}Ga_{1-x}N$ light-emitting diodes, the origin of which is still poorly
understood. Here we have combined electron energy loss spectroscopy (EELS)
imaging at sub... | 2102.03590v1 |
2021-02-08 | Improvement of reversible H storage capacity by fine tuning of the composition in the pseudo-binary systems A2-xLaxNi7 (A = Gd, Sm, Y, Mg) | A2B7 compounds (A = rare earth or Mg, B = transition metal) are widely
studied as active materials for negative electrode in Ni-MH batteries. By
playing on the substitution rate of both A and B elements, it is possible to
prepare various compositions. This strategy will help to improve the
properties, for example get a... | 2102.04161v1 |
2021-02-12 | Combinatorial tuning of electronic structure and thermoelectric properties in Co$_2$MnAl$_{1-x}$Si$_x$ Weyl semimetals | A tuning of Fermi level (E$_F$) near Weyl points is one of the promising
approaches to realize large anomalous Nernst effect (ANE). In this work, we
introduce an efficient approach to tune E$_F$ for the Co$_2$MnAl Weyl semimetal
through a layer-by-layer combinatorial deposition of Co$_2$MnAl$_{1-x}$Si$_x$
(CMAS) thin f... | 2102.06412v2 |
2021-02-15 | High-entropy van der Waals materials formed from mixed metal dichalcogenides, halides and phosphorus trisulfides | The charge, spin, and composition degrees of freedom in high-entropy alloy
endow it with tunable valence and spin states, infinite combinations and
excellent mechanical performance. Meanwhile, the stacking, interlayer, and
angle degrees of freedom in van der Waals material bring it with exceptional
features and technol... | 2102.07493v2 |
2021-02-17 | Performance of dopamine modified 0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Zr0.2Ti0.8)O3 filler in PVDF nanocomposite as flexible energy storage and harvester | We demonstrate the potential of dopamine modified
0.5(Ba0.7Ca0.3)TiO3-0.5Ba(Zr0.2Ti0.8)O3 filler incorporated poly-vinylidene
fluoride (PVDF) composite prepared by solution cast method as both flexible
energy storage and harvesting devices. The introduction of dopamine in filler
surface functionalization acts as bridgi... | 2102.08608v1 |
2021-02-23 | Tax evasion study in a society realized as a diluted Ising model with competing interactions | In this research, the tax evasion percentage, as order parameter, of a system
of individuals or agents inscribed in a $N = L \times L$ 2D square grid is
computed. The influence of local environment over each agent is quantified both
through competitive exchange integrals (ferromagnetic and antiferromagnetic
bonds) and ... | 2102.11763v1 |
2021-02-26 | Chiral photodetector based on GaAsN | The detection of light helicity is key to several research and industrial
applications from drugs production to optical communications. However, the
direct measurement of the light helicity is inherently impossible with
conventional photodetectors based on III-V or IV-VI semiconductors, being
naturally non-chiral. The ... | 2102.13399v2 |
2021-02-26 | Direct imaging of chiral domain walls and Néel-type skyrmionium in ferrimagnetic alloys | The evolution of chiral spin structures is studied in ferrimagnet
Ta/Ir/Fe/GdFeCo/Pt multilayers as a function of temperature using scanning
electron microscopy with polarization analysis (SEMPA). The GdFeCo ferrimagnet
exhibits pure right-hand N\'eel-type domain wall (DW) spin textures over a
large temperature range. ... | 2102.13502v2 |
2021-04-06 | Early volatile depletion on planetesimals inferred from C-S systematics of iron meteorite parent bodies | During the formation of terrestrial planets, volatile loss may occur through
nebular processing, planetesimal differentiation, and planetary accretion. We
investigate iron meteorites as an archive of volatile loss during planetesimal
processing. The carbon contents of the parent bodies of magmatic iron
meteorites are r... | 2104.02706v1 |
2021-04-11 | Combined theoretical and experimental study of the electronic and optical property of Sb$_2$WO$_6$ | Both theoretical and experimental analysis are carried out to understand the
physical properties of the fascinating electronic and optical properties of
antimony tungstate (Sb$_2$WO$_6$). The nanosized ($\sim 40-80~nm$) material is
produced using hydrothermal method followed by the SEM and XRD analysis to find
the stru... | 2104.04956v2 |
2021-04-21 | Electrically driven programmable phase-change meta-switch reaching 80% efficiency | Despite recent advances in active metaoptics, wide dynamic range combined
with high-speed reconfigurable solutions is still elusive. Phase-change
materials (PCMs) offer a compelling platform for metasurface optical elements,
owing to the large index contrast and fast yet stable phase transition
properties. Here, we exp... | 2104.10381v2 |
2021-04-20 | Rapid feasibility assessment of components formed through hot stamping: A deep learning approach | The novel non-isothermal Hot Forming and cold die Quenching (HFQ) process can
enable the cost-effective production of complex shaped, high strength aluminium
alloy panel components. However, the unfamiliarity of designing for the new
process prevents its widescale adoption in industrial settings. Recent research
effort... | 2104.13199v1 |
2021-04-27 | Combined numerical and experimental estimation of the fracture toughness and failure analysis of single lap shear test for dissimilar welds | The single lap shear test is widely used to measure the strength of
dissimilar welds even though such a test brings limited understanding of the
intrinsic weld toughness. The present study proposes a numerical finite element
(FE) analysis and experimental characterization of dissimilar joints presenting
various microst... | 2104.13506v1 |
2021-04-28 | Correlation between vibrational anomalies and emergent anharmonicity of local potential energy landscape in metallic glasses | The boson peak (BP) is a universal feature in the Raman and inelastic
scattering spectra of both disordered and crystalline materials. The current
paradigm presents the boson peak as the result of a Ioffe-Regel crossover
between ballistic (phonon) and diffusive-type excitations, where the loss of
coherence of phonons i... | 2104.13740v3 |
2021-04-30 | Berry curvature generation detected by Nernst responses in ferroelectric Weyl semimetal | The quest for nonmagnetic Weyl semimetals with high tunability of phase has
remained a demanding challenge. As the symmetry breaking control parameter, the
ferroelectric order can be steered to turn on/off the Weyl semimetals phase,
adjust the band structures around the Fermi level, and enlarge/shrink the
momentum sepa... | 2104.14876v1 |
2021-04-26 | Imposing equilibrium on measured 3-D stress fields using Hodge decomposition and FFT-based optimization | We present a methodology to impose micromechanical constraints, i.e. stress
equilibrium at grain and sub-grain scale, to an arbitrary (non-equilibrated)
voxelized stress field obtained, for example, by means of synchrotron X-ray
diffraction techniques. The method consists in finding the equilibrated stress
field closes... | 2105.01612v1 |
2021-04-11 | Inspection of ratcheting models for pathological error sensitivity and overparametrization | Accurate analysis of plastic strain accumulation under stress-controlled
cyclic loading is vital for numerous engineering applications. Typically,
models of plastic ratcheting are calibrated against available experimental
data. Since actual experiments are not exactly accurate, one should check the
identification proto... | 2105.01737v1 |
2021-05-05 | Ni$_{80}$Fe$_{20}$ Nanotubes with Optimized Spintronic Functionalities Prepared by Atomic Layer Deposition | Permalloy Ni$_{80}$Fe$_{20}$ is one of the key magnetic materials in the
field of magnonics. Its potential would be further unveiled if it could be
deposited in three dimensional (3D) architectures of sizes down to the
nanometer. Atomic Layer Deposition, ALD, is the technique of choice for
covering arbitrary shapes wit... | 2105.01969v1 |
2021-05-11 | Combinatorial screening of crystal structure in Ba-Sr-Mn-Ce perovskite oxides with ABO3 stoichiometry | ABO3 oxides with the perovskite-related structures are attracting significant
interest due to their promising physical and chemical properties for many
applications requiring tunable chemistry, including fuel cells, catalysis, and
electrochemical water splitting. Here we report on the crystal structure of the
entire fa... | 2105.05206v2 |
2021-05-13 | Prediction of unconventional magnetism in doped FeSb2 | It is commonly believed that in typical collinear antiferromagnets, with no
net magnetization, the energy bands are spin-(Kramers-degenerate. The opposite
case is usually associated with a global time-reversal symmetry breaking (e.g.,
via ferro(i)magnetism), or with the spin-orbit interaction is combined with the
broke... | 2105.06356v2 |
2021-05-14 | Partitioned Active Learning for Heterogeneous Systems | Active learning is a subfield of machine learning that focuses on improving
the data collection efficiency of expensive-to-evaluate systems. Especially,
active learning integrated surrogate modeling has shown remarkable performance
in computationally demanding engineering systems. However, the existence of
heterogeneit... | 2105.08547v2 |
2021-05-26 | Room temperature superconductivity dome at a Fano resonance in superlattices of wires | Recently room temperature superconductivity with Tc=15 degrees Celsius has
been discovered in a pressurized complex ternary hydride, CSHx, which is a
carbon doped H3S alloy. The nanoscale structure of H3S is a particular
realization of the 1993 patent claim of superlattice of quantum wires for room
temperature supercon... | 2105.13123v1 |
2021-05-28 | Influence of magnetic fields on ultrafast laser-induced switching dynamics in Co/Gd bilayers | Recently it has been shown that not only GdFeCo alloys exhibit single-pulse
helicity-independent all-optical switching (HI-AOS), but that this effect is
also seen in Co/Gd bilayers. However, there have been no reports on the
explicit time dynamics of the switching process in these bilayers as of yet.
Furthermore, time-... | 2105.13862v1 |
2021-06-09 | Nanoscale Chemical Heterogeneity Dominates the Optoelectronic Response over Local Electronic Disorder and Strain in Alloyed Perovskite Solar Cells | Halide perovskites perform remarkably in optoelectronic devices including
tandem photovoltaics. However, this exceptional performance is striking given
that perovskites exhibit deep charge carrier traps and spatial compositional
and structural heterogeneity, all of which should be detrimental to
performance. Here, we r... | 2106.04942v1 |
2021-06-15 | A strengthening model of particle-matrix interaction based on an axisymmetric strain gradient plasticity analysis | Precipitation of fine particles into the base material of a metal is a potent
strengthening mechanism. This is numerically analyzed within a continuum
framework based on a higher order strain gradient plasticity theory and by use
of an axi-symmetric unit cell model. The unit cell contains a spherical
particle which is ... | 2106.08432v1 |
2021-06-16 | Enhanced GeSn Microdisk Lasers Directly Released on Si | GeSn alloys are promising candidates for complementary
metal-oxide-semiconductor (CMOS)-compatible, tunable lasers. Relaxation of
residual compressive strain in epitaxial GeSn has recently shown promise in
improving the lasing performance. However, the suspended device configuration
that has thus far been introduced to... | 2106.08874v1 |
2021-06-16 | The mechanical and electrochemical properties of polyaniline-coated carbon nanotube mat | The measured capacitance, modulus and strength of carbon nanotube-polyaniline
(CNT-PANI) composite electrodes render them promising candidates for structural
energy storage devices. Here, CNT-PANI composite electrodes are manufactured
with electrodeposition of PANI onto the bundle network of CNT mats produced via
a flo... | 2106.09097v1 |
2021-06-23 | Drastic effect of sequential deposition resulting from flux directionality on the luminescence efficiency of nanowire shells | Core-shell nanowire heterostructures form the basis for many innovative
devices. When compound nanowire shells are grown by directional deposition
techniques, the azimuthal position of the sources for the different
constituents in the growth reactor, substrate rotation, and nanowire
self-shadowing inevitably lead to se... | 2106.12309v1 |
2021-06-28 | Creating tunable and coupled Rashba-type quantum dots atom-by-atom | Artificial lattices created by assembling atoms on a surface with scanning
tunneling microscopy present a platform to create matter with tailored
electronic, magnetic and topological properties. However, such artificial
lattices studies to date have focused exclusively on surfaces with weak
spin-orbit coupling. Here, w... | 2106.14561v1 |
2021-06-28 | Towards Universal Neural Network Potential for Material Discovery Applicable to Arbitrary Combination of 45 Elements | Computational material discovery is under intense study owing to its ability
to explore the vast space of chemical systems. Neural network potentials (NNPs)
have been shown to be particularly effective in conducting atomistic
simulations for such purposes. However, existing NNPs are generally designed
for narrow target... | 2106.14583v2 |
2021-07-29 | Counterexample Classification | In model checking, when a given model fails to satisfy the desired
specification, a typical model checker provides a counterexample that
illustrates how the violation occurs. In general, there exist many diverse
counterexamples that exhibit distinct violating behaviors, which the user may
wish to examine before decidin... | 2108.00885v3 |
2021-08-07 | Role of interfacial energy and liquid diffusivities on pattern formation during thin-film three-phase eutectic growth | In this paper, we investigate three-phase eutectic growth during thin-film
directional solidification of a model symmetric ternary eutectic alloy. In
contrast to two-phase eutectics that have only a single possibility,
${\alpha}{\beta}{\alpha}{\beta}$..., as the growth pattern, during three-phase
eutectic growth infini... | 2108.03480v1 |
2021-08-09 | Understanding the roles of electronic effect in CO on Pt-Sn alloy surface via band structure measurements | Using angle-resolved photoemission spectroscopy, we show the direct evidence
of charge transfer between adsorbed molecules and metal substrate, i.e.
chemisorption of CO on Pt(111) and Pt-Sn/Pt(111) 2x2 surfaces. The observed
band structure shows a unique signature of charge transfer as CO atoms are
adsorbed,revealing t... | 2108.03855v1 |
2021-08-13 | 1D photonic crystal direct bandgap GeSn-on-insulator laser | GeSn alloys have been regarded as a potential lasing material for a
complementary metal-oxide-semiconductor (CMOS)-compatible light source. Despite
their remarkable progress, all GeSn lasers reported to date have large device
footprints and active areas, which prevent the realization of densely
integrated on-chip laser... | 2108.06142v2 |
2021-08-19 | Printable, castable, nanocrystalline cellulose-epoxy composites exhibiting hierarchical nacre-like toughening | Due to their exceptional mechanical and chemical properties and their natural
abundance, cellulose nanocrystals (CNCs) are promising building blocks of
sustainable polymer composites. However, the rapid gelation of CNC dispersions
has generally limited CNC-based composites to low CNC fractions, in which
polymer remains... | 2108.08747v1 |
2021-08-19 | A Deep Learning Based Automatic Defect Analysis Framework for In-situ TEM Ion Irradiations | Videos captured using Transmission Electron Microscopy (TEM) can encode
details regarding the morphological and temporal evolution of a material by
taking snapshots of the microstructure sequentially. However, manual analysis
of such video is tedious, error-prone, unreliable, and prohibitively
time-consuming if one wis... | 2108.08882v1 |
2021-08-21 | Mechanisms of bulk and surface diffusion in metallic glasses determined from molecular dynamics simulations | The bulk and surface dynamics of Cu50Zr50 metallic glass were studied using
classical molecular dynamics (MD) simulations. As the alloy undergoes cooling,
it passes through liquid, supercooled, and glassy states. While bulk dynamics
showed a marked slowing down prior to glass formation, with increasing
activation energ... | 2108.09426v1 |
2021-08-24 | Skyrmion stabilization at the domain morphology transition in ferromagnet/heavy metal heterostructures with low exchange stiffness | We report the experimental observation of micron-scale magnetic skyrmions at
room temperature in several Pt/Co-based thin film heterostructures designed to
possess a low exchange stiffness, perpendicular magnetic anisotropy, and a
modest interfacial Dzyaloshinskii-Moriya interaction (iDMI). We find both
experimentally ... | 2108.10973v1 |
2021-08-25 | A Stable High-Capacity Lithium-Ion Battery Using a Biomass-Derived Sulfur-Carbon Cathode and Lithiated Silicon Anode | A full lithium-ion-sulfur cell with a remarkable cycle life was achieved by
combining an environmentally sustainable biomass-derived sulfur-carbon cathode
and a pre-lithiated silicon oxide anode. X-ray diffraction, Raman spectroscopy,
energy dispersive spectroscopy, and thermogravimetry of the cathode evidenced
the dis... | 2108.11284v1 |
2021-08-25 | A perspective magnetic bed comprising Gd alloy multi-microwires for energy-efficient magnetic refrigeration | We have designed a new magnetic bed structure with desirable table-like
magnetocaloric effect (MCE) by using three kinds of soft ferromagnetic Gd-Al-Co
microwire arrays with different Curie temperatures ($T_C$). The $T_C$ interval
of these three wires is ~10 K and the designed new structure named Sample A.
This sample ... | 2108.11446v1 |
2021-09-01 | Synthesis and Characterization of the Ternary Nitride Semiconductor Zn$_2$VN$_3$: Theoretical Prediction, Combinatorial Screening and Epitaxial Stabilization | Computationally guided high-throughput synthesis is used to explore the
Zn-V-N phase space, resulting in the synthesis of a novel ternary nitride
Zn$_2$VN$_3$. Following a combinatorial PVD screening, we isolate the phase and
synthesize polycrystalline Zn$_2$VN$_3$ thin films with wurtzite structure on
conventional bor... | 2109.00365v2 |
2021-09-16 | Highly Tunable Magnetic and Magnetotransport Properties of Exchange Coupled Ferromagnet/Antiferromagnet-based Heterostructures | Antiferromagnets (AFMs) with zero net magnetization are proposed as active
elements in future spintronic devices. Depending on the critical thickness of
the AFM thin films and the measurement temperature, bimetallic Mn-based alloys
and transition metal oxide-based AFMs can host various coexisting ordered,
disordered, a... | 2109.08136v1 |
2021-08-28 | Impact of Surface and Pore Characteristics on Fatigue Life of Laser Powder Bed Fusion Ti-6Al-4V Alloy Described by Neural Network Models | In this study, the effects of surface roughness and pore characteristics on
fatigue lives of laser powder bed fusion (LPBF) Ti-6Al-4V parts were
investigated. The 197 fatigue bars were printed using the same laser power but
with varied scanning speeds. These actions led to variations in the geometries
of microscale por... | 2109.09655v1 |
2021-09-22 | Nanoscale characterisation of hydrides and secondary phase particles in Zircaloy-4 | The interaction of hydrogen and metals continues to be industrially relevant
and is a critical part of creating and supporting a safety case for nuclear
reactor operation. In the present work, we explore hydrogen storage and hydride
formation in a zirconium alloy. We characterise the structure and interfaces of
fine sc... | 2109.10955v1 |
2021-09-23 | Large Exotic Spin Torques in Antiferromagnetic Iron Rhodium | Spin torque is a promising tool for driving magnetization dynamics for novel
computing technologies. These torques can be easily produced by spin-orbit
effects, but for most conventional spin source materials, a high degree of
crystal symmetry limits the geometry of the spin torques produced. Magnetic
ordering is one w... | 2109.11108v1 |
2021-09-26 | Electronic phase separation: recent progress in the old problem | We consider the nanoscale electronic phase separation in a wide class of
different materials, mostly in strongly correlated electron systems. The phase
separation turns out to be quite ubiquitous manifesting itself in different
situations, where the itineracy of charge carriers competes with their tendency
toward local... | 2109.12684v2 |
2021-09-30 | Thermal stability of interfacial mixed layers in c-Ni/a-Zr multilayer during annealing: structural and magnetic properties | Annealing of crystalline multilayers composed of two miscible elements
usually causes interfacial mixing of the constituent atoms, possibly leading to
the formation of binary alloys at the interfaces. Magnetron sputtered c-Ni/a-Zr
multilayers deposited at room temperature were vacuum annealed isochronally at
200degC an... | 2109.14870v1 |
2021-10-11 | Free Energy Landscape and Isomerization Rates of Au$_4$ Clusters at Finite Temperature | In metallic nanoparticles, the cluster geometric structures control the
particle's electronic band structure, polarizability, and catalytic properties.
Analyzing the structural properties is a complex problem; the structure of an
assembled cluster changes from moment to moment due to thermal fluctuations.
Conventional ... | 2110.05336v1 |
2021-10-12 | Vapor transport growth of MnBi2Te4 and related compounds | Motivated by fine tuning of the magnetic and topological properties of
MnBi$_2$Te$_4$ via defect engineering, in this work, we report the crystal
growth of MnBi$_2$Te$_4$ and related compounds using vapor transport method and
characterization of vapor transported crystals by measuring elemental analysis,
magnetic and t... | 2110.06034v1 |
2021-10-14 | CNN-DST: ensemble deep learning based on Dempster-Shafer theory for vibration-based fault recognition | Nowadays, using vibration data in conjunction with pattern recognition
methods is one of the most common fault detection strategies for structures.
However, their performances depend on the features extracted from vibration
data, the features selected to train the classifier, and the classifier used
for pattern recogni... | 2110.07191v1 |
2021-10-18 | Vibrational quality classification of metallic turbine blades under measurement uncertainty | Non-destructive testing on metallic turbine blades is a challenging task due
to their complex geometry. Vibrational test-ing such as Process Compensated
Resonance Testing (PCRT) has shown an efficient approach, which first measures
the vibrational response of the turbine blades, and then employs a classifier
to determi... | 2110.09099v1 |
2021-10-18 | Control of Electrochemical Corrosion Properties by Influencing Mn Partitioning through Intercritically Annealing of Medium-Mn Steel | Medium-Mn steels exhibit excellent mechanical properties and lower production
costs compared to high-Mn steels, which makes them a potential material for
future application in the automotive industry. Intercritical annealing (ICA)
after cold rolling allows to control the stacking fault energy (SFE) of
austenite, the fr... | 2110.09205v1 |
2021-10-25 | Correlations between the structural, magnetic, and ferroelectric properties of BaMO3: M = Ti1-x(Mn/Fe)x compounds: A Raman study | Multiferroics possess two or more switchable states such as polarization,
magnetization, etc. Phonon excitations in multiferroic phase are strongly
modified by magnetoelectric coupling, spin-phonon coupling, and anharmonic
phonon-phonon interactions. Here, we have investigated the correlation between
phonons and multif... | 2110.12673v1 |
2021-10-27 | Identification of coherent twin relationship from high-resolution reciprocal space maps | Twinning is a common crystallographic phenomenon, which usually occurs in
crystals during symmetry-lowering phase transition. Once formed, twin domains
play an important role in defining physical properties: for example, twin
domains underpin the giant piezoelectric effect in ferroelectrics,
superelasticity in ferroela... | 2110.14311v1 |
2021-10-29 | Elucidating Pathfinding Elements from the Kubi Gold Mine in Ghana | X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray
spectroscopy (EDX) are applied to investigate the properties of fine-grained
concentrate on artisanal small-scale gold mining samples from the Kubi Gold
Project of the Asante Gold Corporation near Dunwka-on-Offin in the Central
Region of Ghana. Both tec... | 2110.15758v1 |
2021-10-29 | Collapse of Coherent Large Scale Flow in Strongly Turbulent Liquid Metal Convection | The large-scale flow structure and the turbulent transfer of heat and
momentum are directly measured in highly turbulent liquid metal convection
experiments for Rayleigh numbers varied between $4 \times 10^5$ and $\leq 5
\times 10^9$ and Prandtl numbers of $0.025~\leq~Pr~\leq ~0.033$. Our
measurements are performed in ... | 2110.15807v2 |
2021-11-02 | Relevance of Ge incorporation to control the physical behaviour of point defects in kesterite | To reduce the prominent VOC-deficit that limits kesterite-based solar cells
efficiencies, Ge has been proposed over the recent years with encouraging
results, as the reduction of the non-radiative recombination rate is considered
as a way to improve the well-known Sn-kesterite world record efficiency. To
gain further i... | 2111.01450v1 |
2021-11-07 | Sol-gel synthesized double perovskite Gd$_{2}$FeCrO$_{6}$ nanoparticles: Structural, magnetic and optical properties | Lead-free double perovskites are overtaking single perovskites as solar
harvesting materials due to their superior stability, excellent catalytic
efficiency and minimal toxicity. In this investigation, we have synthesized
double perovskite Gd$_{2}$FeCrO$_{6}$ (GFCO) nanoparticles for the first time
via a facile sol-gel... | 2111.04021v1 |
2021-11-08 | In-Situ Sensing and Dynamics Predictions for Electrothermally-Actuated Soft Robot Limbs | Untethered soft robots that locomote using electrothermally-responsive
materials like shape memory alloy (SMA) face challenging design constraints for
sensing actuator states. At the same time, modeling of actuator behaviors faces
steep challenges, even with available sensor data, due to complex
electrical-thermal-mech... | 2111.04851v2 |
2021-11-10 | Quantifying Microstructural Evolution via Time-Dependent Reduced-Dimension Metrics Based on Hierarchical $n$-Point Polytope Functions | We devise reduced-dimension metrics for effectively measuring the distance
between two points (i.e., microstructures) in the microstructure space and
quantifying the pathway associated with microstructural evolution, based on a
recently introduced set of hierarchical $n$-point polytope functions $P_n$. The
$P_n$ functi... | 2111.05926v1 |
2021-11-18 | Spin transport at finite temperatures: A first-principles study for ferromagnetic$|$nonmagnetic interfaces | Symmetry lowering at an interface leads to an enhancement of the effect of
spin-orbit coupling and to a discontinuity of spin currents passing through the
interface. This discontinuity is characterized by a "spin-memory loss" (SML)
parameter $\delta$ that has only been determined directly at low temperatures.
Although ... | 2111.09731v1 |
2021-11-26 | Coexistence of Multifold and Multidimensional Topological Phonons in KMgBO$_{3}$ | Topological interpretations of phonons facilitate a new platform for novel
concepts in phonon physics. Though there are ubiquitous set of reports on
topological electronic excitations, the same for phonons are extremely limited.
Here, we propose a new candidate material, KMgBO 3 , which showcase the
co-existence of sev... | 2111.13313v1 |
2021-11-26 | Oleylamine aging of PtNi nanoparticles giving enhanced functionality for the oxygen reduction reaction | We report a rapid solution-phase strategy to synthesize alloyed PtNi
nanoparticles which demonstrate outstanding functionality for the oxygen
reduction reaction (ORR). This one-pot co-reduction colloidal synthesis results
in a monodisperse population of single-crystal nanoparticles of rhombic
dodecahedral morphology, w... | 2111.13593v1 |
2021-11-26 | Modeling the thermodynamics of the FeTi hydrogenation under para-equilibrium: an ab-initio and experimental study | FeTi-based hydrides have recently re-attracted attention as stationary
hydrogen storage materials due to favorable reversibility, good sorption
kinetics and relatively low costs compared to alternative intermetallic
hydrides. Employing the OpenCalphad software, the thermodynamics of the
(FeTi)$_{1-x}$H$_{x}$ (0 $\leq x... | 2111.13600v2 |
2021-12-01 | Low power continuous-wave all-optical magnetic switching in ferromagnetic nanoarrays | All-optical magnetic switching promises ultrafast, high-resolution
magnetisation control with the technological attraction of requiring no
magnetic field. Existing all-optical switching schemes are driven by ultrafast
transient effects, typically requiring power-hungry femtosecond-pulsed lasers
and complex magnetic mat... | 2112.00697v2 |
2021-12-03 | Absorption kinetics of vacancies by cavities in Aluminum: numerical characterization of sink strengths and first-passage statistics through Krylov subspace projection and eigenvalue deflation | Modeling the microstructural evolution of metal and alloys, specifically
under irradiation, is essential to predict the aging properties of materials.
Many models are based on a transition rate matrix describing the jump
frequencies of defects and involve a master equation governing the time
evolution of a state probab... | 2112.01994v1 |
2021-12-06 | Metal nanopowder production by cryogenic mechanical collision and pulsed electric discharge methods | With the introduction of micro and nanosensors and devices, the need for pure
metal and ceramic powders have risen. Spherical pure metal powders and their
alloys are vital raw materials for near-net-shape fabrication via
powder-metallurgy manufacturing routes as well as feed stocks for powder
injection molding, and add... | 2112.03055v1 |
2021-12-09 | Comparative studies of hydrogen dissolution and release behavior in zirconate oxides by TDS and TMAP4 analysis | Proton-conducting oxides are potential materials for electrochemical devices
such as fuel cells, hydrogen pumps, hydrogen sensors, and the tritium
purification and recovery system in nuclear fusion reactors. The hydrogen
concentration in oxide materials is important, but its precise measurement is
difficult. In this st... | 2112.04649v1 |
2021-12-12 | Interplay of structural and dynamical heterogeneity in the nucleation mechanism in Ni | Gaining fundamental understanding of crystal nucleation processes in metal
alloys is crucial for the development and design of high-performance materials
with targeted properties. Yet, crystallization is a complex non-equilibrium
process and, despite having been studied for decades, the microscopic aspects
that govern ... | 2112.06349v1 |
2021-12-17 | Atomic fluctuations lifting the energy degeneracy in Si/SiGe quantum dots | Electron spins in Si/SiGe quantum wells suffer from nearly degenerate
conduction band valleys, which compete with the spin degree of freedom in the
formation of qubits. Despite attempts to enhance the valley energy splitting
deterministically, by engineering a sharp interface, valley splitting
fluctuations remain a ser... | 2112.09606v4 |
2021-12-17 | SiGe quantum wells with oscillating Ge concentrations for quantum dot qubits | Large-scale arrays of quantum-dot spin qubits in Si/SiGe quantum wells
require large or tunable energy splittings of the valley states associated with
degenerate conduction band minima. Existing proposals to deterministically
enhance the valley splitting rely on sharp interfaces or modifications in the
quantum well bar... | 2112.09765v3 |
2021-12-22 | The effect of the interface energy on pattern selection in alloy solidification: A phase-field study | A thorough understanding of pattern selection is necessary for the control of
solidification structures, which are dissipative structures created by
irreversible processes. In this paper, we simulate solidification evolution
with different Preferred Crystallographic Orientations (PCOs) through the
Phase-Field model. Th... | 2112.11708v4 |
2021-12-30 | A Light-Hole Quantum Well on Silicon | The quiet quantum environment of holes in solid-state devices has been at the
core of increasingly reliable architectures for quantum processors and
memories.1-6 However, due to the lack of scalable materials to properly tailor
the valence band character and its energy offsets, the precise engineering of
light-hole (LH... | 2112.15185v2 |
2022-01-01 | Could Negative Pressures Turn Bismuth into a Metal? The Case of the Expanded | Materials may behave in non-expected ways when subject to unexpected
conditions. For example, when Bi was turned into an amorphous phase
(\textit{a}-Bi) unexpectedly it became a superconductor at temperatures below
$10$ K. We provided an explanation as to why \textit{a}-Bi superconducts and
the crystalline (\textit{c}-... | 2201.00088v1 |
2022-01-05 | High impedance TES bolometers for EDELWEISS | The EDELWEISS collaboration aims for direct detection of light dark matter
using germanium cryogenic detectors with low threshold phonon sensor
technologies and efficient charge readout designs. We describe here the
development of Ge bolometers equipped with high impedance thermistors based on
a NbxSi1-x TES alloy. Hig... | 2201.01639v1 |
2022-01-06 | Optical properties of Au-Hf thin films | The optical properties of thin films of intermetallic Au$_{3}$Hf were
experimentally investigated for the first time, which display clear plasmonic
properties in the optical and near infrared region with negative permittivity.
In contrast to similar alloys, such as films of Au$_{3}$Zr, the films express
more negative $... | 2201.02163v1 |
2022-01-11 | Resonant Precession of Magnetization and Precession -- Induced DC voltages in FeGaB Thin Films | Measurements of frequency dependent ferromagnetic resonance (FMR) and spin
pumping driven dc voltage (V_{dc}) are reported for amorphous films of
Fe_{78}Ga_{13}B_{9} (FeGaB) alloy to address the phenomenon of self-induced
inverse spin Hall effect (ISHE) in plain films of metallic ferromagnets. The
V_{dc} signal, which ... | 2201.03739v1 |
2021-12-28 | Template-assisted growth of silver nanowires by electrodeposition | Template-assisted synthesis is a facile way of growing various
one-dimensional nanostructures. Among various nanoporous templates, anodic
aluminium oxide (AAO) is most commonly used. In this work, the kinetics of
silver nanowire growth by electrodeposition in AAO templates was investigated.
The AAO templates were fabri... | 2201.04947v2 |
2022-01-18 | Laser-induced charge and spin photocurrents at BiAg$_2$ surface: a first principles benchmark | Here, we report first principles calculations and analysis of laser-induced
photocurrents at the surface of a prototype Rashba system. By referring to
Keldysh non-equilibrium formalism combined with the Wannier interpolation
scheme we perform first-principles electronic structure calculations of a
prototype BiAg$_2$ su... | 2201.07122v1 |
2022-01-20 | Evaluation of the Thermal Stability of TiW/Cu Heterojunctions Using a Combined SXPS and HAXPES Approach | Power semiconductor device architectures require the inclusion of a diffusion
barrier to suppress, or at best prevent the interdiffusion between the copper
metallisation interconnects and the surrounding silicon substructure. The
binary pseudo-alloy of titanium-tungsten (TiW), with $>$70~at.\% W, is a well
established ... | 2201.08074v1 |
2022-04-01 | Transition edge sensor based detector: from X-ray to $γ$-ray | The Transition Edge Sensor is extremely sensitive to the change of
temperature, combined with the high-Z metal of a certain thickness, it can
realize the high energy resolution measurement of particles such as X-rays.
X-rays with energies below 10 keV have very weak penetrating ability, so only a
few microns thick of g... | 2204.00010v2 |
2022-04-10 | DFT+U and Quantum Monte Carlo study of electronic and optical properties of AgNiO$_2$ and AgNi$_{1-x}$Co$_{x}$O$_2$ delafossite | As the only semimetallic $d^{10}$-based delafossite, AgNiO$_2$ has received a
great deal of attention due to both its unique semimetallicity and its
antiferromagnetism in the NiO$_2$ layer that is coupled with a lattice
distortion. In contrast, other delafossites such as AgCoO$_2$ are insulating.
Here we study how the ... | 2204.04572v2 |
2022-04-10 | Efficient route to achieve superconductivity improvement via substitutional La-Ce alloy superhydride at high pressure | The discovery of clathrate superhydrides has approached the long-standing
dream of room-temperature superconductivity and thus inspired their prosperous
research under high pressure. However, how to experimentally optimize these
compelling superhydrides is still a formidable challenge. Here, we find that
half of the Ce... | 2204.04623v1 |
2022-04-18 | Tuning skyrmions in B20 compounds by 4d and 5d doping | Skyrmion stabilization in novel magnetic systems with the B20 crystal
structure is reported here, primarily based on theoretical results. The focus
is on the effect of alloying on the 3d sublattice of the B20 structure by
substitution of heavier 4d and 5d elements, with the ambition to tune the
spin-orbit coupling and ... | 2204.08496v1 |
2022-04-20 | Experimental Simulations of Shock Textures in BCC Iron: Implications for Iron Meteorites | Neumann band in iron meteorites, which is deformation twins in kamacite
(Fe-Ni alloy), has been known to be a characteristic texture indicating ancient
collisions on parent bodies of meteorites. We conducted a series of shock
recovery experiments on bcc iron with the projectile velocity at 1.5 km/sec at
various initial... | 2204.09195v1 |
2022-04-25 | Multiscale modelling in nuclear ferritic steels: from nano-sized defects to embrittlement | Radiation-induced embrittlement of nuclear steels is one of the main limiting
factors for safe long-term operation of nuclear power plants. In support of
accurate and safe reactor pressure vessel (RPV) lifetime assessments, we
developed a physics-based model that predicts RPV steel hardening and
subsequent embrittlemen... | 2204.11441v1 |
2022-04-27 | High-performance broadband Faraday rotation spectroscopy of 2D materials and thin magnetic films | We present a Faraday rotation spectroscopy (FRS) technique for measurements
on the micron scale. Spectral acquisition speeds of many orders of magnitude
faster than state-of-the-art modulation spectroscopy setups are demonstrated.
The experimental method is based on charge-coupled-device detection, avoiding
speed-limit... | 2204.12809v1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.